Vehicle-brake attachment.



Wm H. MAYO. VEHHJLE BRAKE ATTACHMENT.

APPLICATlQN'FJLED FB- 4. 1915.

1,212,983. Patented Jan. 16,1917.

gnu u lot mamww PATENT onnron.

1 .UNITED STATES WILLIAM H. MIA/YO, OFROYALTON, VERMONT.

a VEHICLE-BRAKE ATTACHMENT.

To 0: whoz'n z'zfmczg concern: 1

Bait known that I, VVILL AM H. MAYO, a citizen of the United States, residing at Royalton, in the county of VVindso-r, State of Vermont, have invented a new and useful Vel 'icleBrake Attachment; and I do here by declare the following to be a full, clear, and description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, v

The prescnt invention relates to vehicle brakes, and more particularly to an attachrncnt adapted to be applied to motor cars having ,tlieservicebrake upon the transmission for the purpose of changing the service brake to the rear Wheels, the object of the invention being to provide a brake attaclr ment of this character which can be applied to the car without making any changesin the constructionthereof, and which utilizes the samebrakepedal.

Further objects of the invention are to provide a brake attachment of this character which is comparatively simple and inex pensive in its construction, which can be readily mounted upon the motor vehiole as an attachment, and whmhwill greatly im= prove the braking system substituting a D mounted upon one side. of'the transmissionservice brake. case' 6 and controls a vconventional"form of rear Wheel service brake for a transmission ,With these and other ohjeotsin view the .invel-ition consistsin certain novel combinations, and arrangements of the parts as will more iully appear as the description proceeds,. the novel features thereof being pointed out in the appended: claims.

FOIz-a full understanding of theinve'ntlon,

reference is to be had-to thefollow ing d o5.=

scription and: 1 accompanying drawing, flim 'vzhich:'

Figure l is a top plan view ofthe: chassis I and running gear of an automobile showing a braking system constructed in accordance with the invention applied thereto. Fig. 2

is an enlarged transverse sectional view through the rear axle, taken on the line 2 2 of Fig. 1. Fig. 3 is a transverse sectional View through one of the rear Wheelsand the brake drum and band .carrled thereby;

the brake showing the manner of applgre g F 4 1g. Is

drum to the spokes of the w an enlarged side elevationof the transmission case ofthe automobile engine, showing the manner of connecting the service Brake pedal with the braking system. Eris an Specification of Letters Patent.

7 brake.

nected at-its middle portion to the'drive- Patented Jan. 1c, 1917.

enlargedside elevation of the crank arms and brake evener applied to the brake shafts. Fig; 6 is a front elevation thereof, portions of the supporting clip about the transmis sion shaft casing being broken away and shown in section. Fig. 7 is a side elevation of the brakeshaft bearing applied to the radius rod. Fig. 8 is an end elevation thereof. l

Corresp'onding and like parts are referred to in the following description and indicated in all the views of the drawing by the same reference characters. a

The motor vehicle A to which the brake attachmentis applied is shownin a frogmentary manner, all those. parts not noose sary to illustrate the invention being omitted. The numerals .1 designate the rear wheels which are provided 'withthe .usual brake drums 2 within which the conventional expanding brake shoes are mounted, the said brake drums and brake shoes constituting what is. termed the emergency Therear axle. housing 3 is con- "shaft housing 4, while the endgportions of the rear axle housing are oonn' by the rear radius. rods 5 to the transmissioncase 6. The usual service brake pedal x7 is brake band which ordinarily operates upon the transmission," being known asv a trans mission service broke. The above parts are all of the well known andconventionalconstruction, being found in what is known to thetrade as a Ford automobile. Gomplemcntal bearing blocks 8 are clamped against opposite sidesof thedrivo shaft. roller bearin housing 4*-,: said bearingagainst the housing, and the endsYof-"the' blocks being connected by the irespectivo transverse clamping bolts 9. These blocks 8 are provided Wltl} bearings 83' -within which theinnerends of oppositely extending andindependent brake shafts 10mm journaled. The outer ends of the said brake shafts have cross heads, 11 rigidly applied;

- to the extremities thereof, and 'ou'r'nalod within boarin gs 12 whic ,dctac appliedby meansoif og c .to t

a crank arm 14, the upper ends of the crank arms being loosely connected by a transverse evener 15 which extends across the to of the drive shaft housing. The middle 0 the 5 evener 15 is connected to the rear end of a special brake rod 16' which extends forwardly and has its front end pivotally connected to the upper-end of an auxiliary lever 17 said lever being pivotally mounted at its lower end upon a bracket 18 which is secured to the transmission case 6 by one of the usual bolts 19. This auxiliary lever 17 is connected by a short link 20 to a clip 21 which is applied to the transmission brake pedal 7. e usual transmission brake band can be loosened so that it will be ino erative, and when the brake pedal 7 is us ed forward the auxiliary lever 17 will e operated and the special brake rod 16= caused to rotate the brake shafts 10. 2

Auxiliary brake drums 22' which surround the emergency brake drums 2 are applied to the rear wheels 1. These auxiliary brake drums are provided with inwardly cxtend ing flanges 23 which fit against the rear wheels and provide just a sufiicicnt amount of clearance to fit over the emergency brake drums 2. These flanges 23 are connected by suitable cli s' 24 to the spokes of the rear wheels, said clips preferab y engaging alter-- nate spokes. Extending around the special auxiliary brake drums 22 are steel brake bands 25 which have the usual brake band lining 26 applied thereto. J One end of each of the brake bands 25 is pivotally connected at 27 to one end of the cross head 11, andadjustably connected by a bolt 28 to the opposite end of the said cross head 11. A nut 29'which is applied to the bolt 28 admits of the brake band being adjusted, and the brake band is normally loose u on the brake drum, although when the bra e shaft 10 is rotated the cross head 11 serves to draw the brake band tightly aroundthe brake drum so that it wil firmly grip' the latter and either retard rotation'of the rear wheel or completely lock the same a ainst rotation. The middle portions of their areprovided with outwardly extending pins 30 which pass through openings in angular: brackets 31 secured in position by the rake shoe supportin bolt 32 which is already upon the vehic e. A small .coil spring 33 surrounds the projecting end of each pin 39 so as to be interposed between the bracket. 31-

and a nut 34 upon the pin. These springs serve to normall hold the brake bands away from and out o engagement with the'brake rake bands 25 drums, although when the brake shafts are rotated to apply the brakes, the action of the springs is overcome and the brake bands drawn tightly around the brake drums.

This device isadapted to be applied as an attachment to what is ordinarily known as the Ford automobile and enables a service brake acting directly upon the rear wheels to be used instead of the usual transmission service brake, the former bein much more satisfactory since it gives quic er and more direct results and ehminates the wear and tear upon the transmission gearing, and differential gearing which is incident-to the use of a transmission service brake.

Having thus described the invention' what I claim as new and desire to secure by Letters Patent, is i 1. A service brake attachment for automobiles of the Ford type which are characterized by a foot pedal operated service brake acting upon the transmission and an emergency brake including standard brake drums on the rear wheels, said brake attachment ineluding auxiliary brake drums fitted overthe standard brake drums and centered upon the wheels thereby, brake bands for the auxiliary brake drums, an auxiliary lever mounted upon the transmission case, an o erative connection between the auxiliary ever and the brake bands, and an operative connection between the auxiliary lever and the standard service brake foot pedal.

2. A service brake attachment for automobiles of the Ford type which are characterizedby a foot pedal operated service brake acting upon the transmission and an emergency brake including standard brake drums on the rear wheels, said brake attachment including auxiliary brake drums fitted upon the standard brake drums and centered upon the brake shafts journaled upon the bearing clips, brake bands applied to the auxiliary brake drums andoperatively connected to the brake shafts and an operative conneca tion between the brake shafts and thefstandard service brake foot pedal.

In testimony whereof I have signed my Y name to this specification in the two subscribing witnesses.

WILLIAM H. MAYO. Witnesses: h

J Arms F. WA"mnMAN. Myron J 13001:.

presence of 

